Keep the Heat
“We installed our first one some years ago,” says Archer of heat-recovery ventilation systems, “and it was an enormous box the size of a small shower room. Nowadays, you can get a mechanism that is only slightly bigger than a toaster and is very cost-effective.” Here, Archer installed a rooftop heat-exchanger mechanism by Vent-Axia that transforms heat from the stale air being drawn out of the house into fresh air, which is then distributed inside.